She rode a car at_____I think is a dangerous speed.填空应该填什么单词?到底应该是 which 还是what

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She rode a car at_____I think is a dangerous speed.填空应该填什么单词?到底应该是 which 还是what
She rode a car at_____I think is a dangerous speed.
填空应该填什么单词?
到底应该是 which 还是what

She rode a car at_____I think is a dangerous speed.填空应该填什么单词?到底应该是 which 还是what
应该填 what
如果用which,就变成了一个定语从句,修饰前面的名字,但前面是at,所以不能是which. 如果句子变成She rode a car a speed ____ I think is dangerous, 则该选which.
拿不定注意的话,自己上网验证一下.上google English搜索“at what I think”和“at which I think”,从搜索结果你就可以知道哪个是正确的了.